\input dvipaste
\font\it=cmti10
\def\rm{\tenrm}
Here is some text that we have before the joined boxes. Now we will have the
boxes joined by a line segment:
\hbox{\paste{boxes1}1%
\vrule height 30pt depth-29pt width1in
\paste{boxes2}2}
And this is the text that we have after it.
Here is just a lot of stuff \it that we will continue to put in italics,
for the rest of the file, in fact.
\vfil\eject
This is some more text.
\hbox{\paste{boxes1}4%
\vrule height 30pt depth-29pt width1in
\paste{boxes2}1}
And this is the text that we have after it.
\vfil\eject
\rm Now we are back to roman type.
\hbox{\paste{boxes1}3%
\vrule height 30pt depth-29pt width1in
\paste{boxes1}4}
And this is the text that we have after it.
\bye